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Finding the Fourth Proportional to 379.28, 571.25 and 354.98

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Solution

The fourth proportional to 379.28, 571.25 and 354.98 is: 534.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.28 : 571.25 = 354.98 : x
  2. Step 2: Convert to fraction form
    379.28/571.25 = 354.98/x
  3. Step 3: Cross multiply
    379.28x = 571.25 × 354.98
  4. Step 4: Simplify right side
    379.28x = 202,784.64
  5. Step 5: Solve for x
    x = 202,784.64/379.28
  6. Step 6: Final answer
    x = 534.65

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.